Audio-level-detector


Posted on Oct 23, 2012

This circuit draws very little power, less than 5 mA with a single 6-V power supply. making it ideal for portable battery-operated equipment. The small size and low power consumption belie the 90-dB dynamic range and 10.5-I`V sensitivity. De output voltage proportional to the log10 of the input signal level. Thus, a standard 0 -5 voltmeter can be linearly calibrated in decibels over a single 80-dB range.


Audio-level-detector
Click here to download the full size of the above Circuit.

The circuit is within 1.5-dB tolerance over the 80-dB range for audio frequencies from 100Hz to 10kHz. Higher audio levels can be measured by placing an attenuator ahead of the input capacitor.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Switch Debouncing
Leach amplifier
Astable
Audio Expander Circuit
Dynamo Frequency Monitor
555 and 556 Timer Circuits
VW CAR PASSAT ENGINE CONTROL AND AUTOMATIC SOLENOID ELECTRICAL WIRING CIRCUIT
multi channel audio mixer using lm 3900
DTMF Decoder 2
EI30 Transformer board



Top